Death Throes of a Great Rainforest - Squatter's shack on the fringe of the Sierra Madre Mountain rainforest encroaching deep into the Agta Negrito people's traditional homeland, Luzon, Philippines ..Squatter's shack on the fringe of the Sierra Madre Mountain rainforest. The loggers finish and settlers move in behind them. The Agta Negritos have all but run out of room with the forest receeding up from the coast on one side and from the Cagayan Valley from the other. The forest on the Sierra Madre's west side has been clear cut almost to the base of the mountains, Luzon, Philippines.